﻿using System;
using System.Text.RegularExpressions;

namespace CNative.Utilities
{
    public class ValidateHelper
    {
        /// <summary>
        /// 校验字符串是否为Int
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsInt(string str)
        {
            int tryInt = 0;
            return int.TryParse(str, out tryInt);
        }

        /// <summary>
        /// 校验字符串是否为Bool
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsBool(string str)
        {
            bool tryInt = false;
            return Boolean.TryParse(str, out tryInt);
        }

        /// <summary>
        /// 校验字符串是否为Decimal
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsDecimal(string str)
        {
            decimal tryDecimal = 0;
            return decimal.TryParse(str, out tryDecimal);
        }

        /// <summary>
        /// 是否是电话
        /// </summary>
        /// <param name="str_telephone"></param>
        /// <returns></returns>
        public static bool IsTelephone(string str_telephone)
        {
            return Regex.IsMatch(str_telephone, "^(\\d{3,4}-)?\\d{6,8}$");
        }

        /// <summary>
        /// 是否是手机
        /// </summary>
        /// <param name="str_Mobile"></param>
        /// <returns></returns>
        public static bool IsMobile(string str_Mobile)
        {
            return Regex.IsMatch(str_Mobile, "^[1]+[3,5,8]+\\d{9}");
        }

        /// <summary>
        /// 完全判断身份证是否合法
        /// </summary>
        /// <param name="ID"></param>
        /// <returns></returns>
        public static bool IsIDcard2(string ID)
        {
            if (ID == null) return false;
            if (ID.Length == 18)
                return CheckIDCard18(ID);

            if (ID.Length == 15)
                return CheckIDCard15(ID);

            return false;
        }

        /// <summary>
        /// 根据身份证号返回出生日期
        /// </summary>
        /// <param name="ID"></param>
        /// <returns></returns>
        public static DateTime GetBirthDayByIDCard(string ID)
        {
            if (ID.Length == 15)
                return Convert.ToDateTime("19" + ID.Substring(6, 2) + "-" + ID.Substring(8, 2) + "-" + ID.Substring(10, 2));
            return Convert.ToDateTime(ID.Substring(6, 4) + "-" + ID.Substring(10, 2) + "-" + ID.Substring(12, 2));
        }

        /// <summary>
        /// 根据身份证号返回性别
        /// </summary>
        /// <param name="ID"></param>
        /// <returns></returns>
        public static int GetSexbyIDCard(string ID)
        {
            string empty = string.Empty;
            return int.Parse(ID.Length != 15 ? ID.Substring(16, 1) : ID.Substring(14, 1)) % 2 == 0 ? 2 : 1;
        }

        private static bool CheckIDCard18(string Id)
        {
            long n = 0;
            if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)
                return false;//数字验证

            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2)) == -1)
                return false;//省份验证

            string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");
            DateTime time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
                return false;//生日验证

            string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
            string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
            char[] Ai = Id.Remove(17).ToCharArray();
            int sum = 0;
            for (int i = 0; i < 17; i++)
                sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());

            int y = -1;
            Math.DivRem(sum, 11, out y);
            if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())
                return false;//校验码验证

            return true;//符合GB11643-1999标准
        }

        private static bool CheckIDCard15(string Id)
        {
            long n = 0;
            if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14))
                return false;//数字验证

            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2)) == -1)
                return false;//省份验证

            string birth = Id.Substring(6, 6).Insert(4, "-").Insert(2, "-");
            DateTime time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
                return false;//生日验证

            return true;//符合15位身份证标准
        }
    }
}
